圣多里尼的新居民开采火山灰，制成了水泥——石头之下仍然找到古代遗迹。
New inhabitants of Santorini mine the volcanic ash to make cement - and still find ancient ruins under the stone.
锰铁合金渣具有潜在的水硬性和火山灰性，可用作混凝土掺合料和水泥混合材料。
Ferromanganese slag has the latent hydraulicity and volcanic ash, it can be used to build concrete admixtures and cement.
矿渣微粉的增强效应及其子效应都对矿渣水泥28天强度贡献最大，并以火山灰效应为主，约占总效应的80%。
The enhancement effect and its sub-effect of superfine slag powder contribute most on slag cement's 28th strengths, in which the pozzolanic effect is the main factor and is amount to 80%.
通过试验研究确定大庆油页岩灰符合火山灰质混合材要求，能与熟料掺混生产水泥。
It was confirmed that the oil shale ash met the requirement of the standards of pozzuolanic admixture and could be as cement filler.
煤矸石经热力活化后表现出较好的火山灰活性，水泥强度得到明显改善。
Whereas, those thermally activated coal gangue showed better pozzolanic reactivity, producing improved mortar strength properties.
古罗马人已经发现火山灰制作的水泥质量更好。
The ancient Romans discovered that volcanic ash made better cement.
作者用盐城地区的粘土，进行了低温煅烧粘土的火山灰活性和用作水泥混合材的试验研究。
With the clay in Yancheng area, the author has carried out experimental researches on the pozzolanic reactivity of the low temperature burnt clay and its application as cement admixture.
同时讨论了粉煤灰水泥硬化浆体的物理化学性能与水化时间的关系，以及硬化浆体中粉煤灰的火山灰活性。
At the same time, the relationship between the physical-chemical properties of the harden paste and the hydration age, the pozzolan activity of the fly ash in the harden paste have been discussed.
同时讨论了粉煤灰水泥硬化浆体的物理化学性能与水化时间的关系，以及硬化浆体中粉煤灰的火山灰活性。
At the same time, the relationship between the physical-chemical properties of the harden paste and the hydration age, the pozzolan activity of the fly ash in the harden paste have been discussed.
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